US3405918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable venturi for scrubbers
Assignee: Airetron Engineering Corp
•
Filing: 1967-03-03
•
Granted: 1968-10-15
•
Expires: 1987-03-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Calaceto
- 👤 Reuben H Durst
- 👤 Millar David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:07
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2964403A
Cited
US3009687A
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US3138647A
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US3145239A
Cited
US3199267A
Cited
FR1381961A
Cited
FR1381960A
Cited
FR1381962A
Cited
US3350076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |